1223305501 has 16 divisors (see below), whose sum is σ = 1348300800. Its totient is φ = 1100660400.

The previous prime is 1223305493. The next prime is 1223305513. The reversal of 1223305501 is 1055033221.

It is a cyclic number.

It is not a de Polignac number, because 1223305501 - 2³ = 1223305493 is a prime.

It is a super-2 number, since 2×1223305501² = 2992952697553722002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223305541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 578436 + ... + 580546.

It is an arithmetic number, because the mean of its divisors is an integer number (84268800).

Almost surely, 2^1223305501 is an apocalyptic number.

1223305501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1223305501 is a deficient number, since it is larger than the sum of its proper divisors (124995299).

1223305501 is a wasteful number, since it uses less digits than its factorization.

1223305501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 1223305501 is about 34975.7844944184. The cubic root of 1223305501 is about 1069.4938943462.

Adding to 1223305501 its reverse (1055033221), we get a palindrome (2278338722).

The spelling of 1223305501 in words is "one billion, two hundred twenty-three million, three hundred five thousand, five hundred one".